Abstract
The final procedure of the standard production processing and interpretation of seismic data is the post-stack migration by the central deep point method (CDP). However, in practice, a more informative image of the deep section is given by the pre-stack migration according to initial seismograms. The actual task of processing and interpretation of the observed wave field to produce the image of the deep structure without the procedure of the CDP stack is presented. This solution is implemented using a new version of the finite-difference pre-stack migration of the shot record in time domain. The advantages and possibilities of applications of this method are shown in model and real examples.
Highlights
Ïî ïîäõîäó ê ðåøåíèþ âîëíîâîãî óðàâíåíèÿ ìåòîäû ìèãðàöèè ïîäðàçäåëÿåòñÿ íà òðè îñíîâíûõ âèäà: ìèãðàöèÿ Êèðõãîôôà, ìèãðàöèÿ â ñïåêòðàëüíîé îáëàñòè è êîíå÷íî-ðàçíîñòíàÿ ìèãðàöèÿ.
 çàðóáåæíîé ëèòåðàòóðå èçâåñòåí òåðìèí pre-stack time migration (PSTM) (äîñëîâíûé ïåðåâîä âðåìåííàÿ ìèãðàöèÿ äî ñóììû ) , êîòîðûé îïðåäåëÿåò ìåòîä ìèãðàöèè äî ïðîöåäóðû ñóììèðîâàíèÿ òðàññ ìåòîäîì ÎÃÒ ïî àëãîðèòìó Êèðõãîôôà [Hubral, 1977; Yuan et al .
Ïðåäëîæåííûé â ñòàòüå íîâûé ìåòîä êîíå÷íî-ðàçíîñòíîé ìèãðàöèè ïî îáùåìó ïóíêòó âîçáóæäåíèÿ îòëè÷àåòñÿ ãëàâíûì îáðàçîì òåì, ÷òî âûïîëíÿåòñÿ âî âðåìåííîé îáëàñòè ñ ïðåäñòàâëåíèåì ãëóáèí â ìàñøòàáå âðåìåíè.
Summary
Ïî ïîäõîäó ê ðåøåíèþ âîëíîâîãî óðàâíåíèÿ ìåòîäû ìèãðàöèè ïîäðàçäåëÿåòñÿ íà òðè îñíîâíûõ âèäà: ìèãðàöèÿ Êèðõãîôôà, ìèãðàöèÿ â ñïåêòðàëüíîé îáëàñòè è êîíå÷íî-ðàçíîñòíàÿ ìèãðàöèÿ.  çàðóáåæíîé ëèòåðàòóðå èçâåñòåí òåðìèí pre-stack time migration (PSTM) (äîñëîâíûé ïåðåâîä âðåìåííàÿ ìèãðàöèÿ äî ñóììû ) , êîòîðûé îïðåäåëÿåò ìåòîä ìèãðàöèè äî ïðîöåäóðû ñóììèðîâàíèÿ òðàññ ìåòîäîì ÎÃÒ ïî àëãîðèòìó Êèðõãîôôà [Hubral, 1977; Yuan et al . Ïðåäëîæåííûé â ñòàòüå íîâûé ìåòîä êîíå÷íî-ðàçíîñòíîé ìèãðàöèè ïî îáùåìó ïóíêòó âîçáóæäåíèÿ îòëè÷àåòñÿ ãëàâíûì îáðàçîì òåì, ÷òî âûïîëíÿåòñÿ âî âðåìåííîé îáëàñòè ñ ïðåäñòàâëåíèåì ãëóáèí â ìàñøòàáå âðåìåíè.
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